Temrex - Gentle Etch 10% by Temrex SKU 927-2424AA 123 $19.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out Gentle-Etch Etching Gel, 10% Phosphoric Acid, 15-second etching time, 12 gram Syringe with 25 Tips.